I might as well add some strangeness to this thread. After the update, the first two times I charged, had to go through the plug in, charge, turn on, unplug, replug, and then the bar worked OK.
Last night it was down to one bar, so plugged it in overnight. This morning, turned it on, and it had all four bars. Unplugged and it still had them.
What did I do to fix it????